In my mind NPA for women (New
Pheromone Additive) is the powerhouse at that price, BUT (and it's a big one) you have to be *extremely* careful
how you use it. Overdosing is worse than no pheromones at all; you might turn on some guys and drive your sweetie
away. Also, depends on location (bar vs. workplace). Basically you need to use a small amount per application
point and cover carefully with your perfume.
I would also check out the book "How to make someone fall in love
with you in 90 minutes".